KR20200061182A - Display device - Google Patents

Abstract

A display device according to an embodiment of the present invention comprises: a substrate provided with a first sub-pixel and a second sub-pixel adjacent to the first sub-pixel; a first electrode provided on the substrate and including a first sub-electrode provided in the first sub-pixel and a second sub-electrode provided in the second sub-pixel; an organic light emitting layer including a first organic light emitting layer disposed on the first sub-electrode and a second organic light emitting layer disposed on the second sub-electrode; a second electrode disposed on the organic light emitting layer; and a first bank provided between the first sub-electrode and the second sub-electrode and separating the first sub-pixel from the second sub-pixel. The first organic light emitting layer comprises a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer and an electron injection layer. The hole blocking layer includes a first pattern portion provided between the hole blocking layer and the electron transport layer. Accordingly, foreign substances such as residues of a photoresist (PR) or a shield (SL) and a stripper solution can be easily removed such that deterioration of device characteristics of the organic light emitting layer can be prevented.

Description

Display device {DISPLAY DEVICE}

The present application relates to a display device for displaying an image.

As the information society develops, the demand for display devices for displaying images is increasing in various forms. Accordingly, in recent years, various display devices such as a liquid crystal display device, a light emitting display device, an organic light emitting display device, a micro light emitting display device, and a quantum dot light emitting display device are used.

In the case of forming red, green, and blue pixels of the organic light emitting layer, the organic light emitting display device can manufacture a small/medium sized panel by a mask shadow as a problem of sagging of a deposition mask when using FMM technology, but it is difficult to apply a large area. On the other hand, the photo process using a photoresist is a technology capable of forming red, green, and blue fine patterns of the organic light emitting layer and manufacturing a large area panel compared to FMM. However, in the photo process using a photoresist, when the residue of the photoresist (PR) or the shield (SL) remains in the form of a residual film on the organic light emitting layer, there is a problem that device characteristics are deteriorated. This problem is exacerbated for display devices that require ultra-high resolution, such as a head-mounted display.

An object of the present application is to provide a display device capable of preventing deterioration of device characteristics of an organic light emitting layer.

A display device according to an exemplary embodiment of the present application includes a substrate having a first sub-pixel and a second sub-pixel adjacent to the first sub-pixel, a first sub-electrode provided on the substrate, and a first sub-electrode provided in the first sub-pixel. An organic light emitting layer and an organic light emitting layer including a first electrode including a second sub electrode provided in 2 sub pixels, a first organic light emitting layer disposed on the first sub electrode, and a second organic light emitting layer disposed on the second sub electrode. A second electrode disposed on the first electrode, and a first bank provided between the first sub-electrode and the second sub-electrode to distinguish the first sub-pixel and the second sub-pixel, the first organic emission layer is a hole injection layer, It includes a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer, and the hole blocking layer may include a first pattern portion provided between the electron transport layer.

The display device according to the present application includes an uneven pattern portion on an upper surface of an organic layer in which a photo process is performed among a plurality of organic layers constituting the organic light emitting layer, so that a foreign material such as a residue of a photoresist (PR) or a shield (SL) and a stripper solution Since it can be easily removed, it is possible to prevent deterioration of device characteristics of the organic light emitting layer.

In addition to the effects of the present application mentioned above, other features and advantages of the present application are described below, or will be clearly understood by those skilled in the art from the description and description.

1 is a schematic cross-sectional view of a display device according to an exemplary embodiment of the present application.
2A to 2J are schematic manufacturing process cross-sectional views of a display device according to an exemplary embodiment of the present application.
3 is an enlarged view of part A of FIG. 2G showing that the water-based stripper is in contact with the pattern portion in the display device according to the exemplary embodiment of the present application.
FIG. 4A is a schematic illustration of FIG. 3 for explaining a contact angle of a water-based stripper and a pattern portion and a width of a pattern portion in a display device according to an embodiment of the present application.
4B is an exemplary view for explaining a reduction in a contact angle between a water-based stripper and a pattern portion according to a reduction in the width of the pattern portion.
5A to 5C relate to a display device according to another exemplary embodiment of the present application, which relates to a head mounted display (HMD) device.

Advantages and features of the present application, and methods for achieving them will be clarified by referring to examples described below in detail together with the accompanying drawings. However, the present application is not limited to the examples disclosed below, but will be implemented in various different forms, and only the examples allow the disclosure of the present application to be complete, and to those skilled in the art to which this application belongs. It is provided to fully inform the scope of the invention, and this application is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining examples of the present application are exemplary, and the present application is not limited to the illustrated matters. The same reference numerals refer to the same components throughout the specification. In addition, in the description of the present application, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present application, the detailed description will be omitted. When'include','have','consist of', etc. mentioned in the present application are used, other parts may be added unless'~man' is used. When a component is expressed as a singular number, the plural number is included unless otherwise specified.

In interpreting the components, it is interpreted as including the error range even if there is no explicit description.

In the case of the description of the positional relationship, for example, when the positional relationship of two parts is described as'~top','~upper','~bottom','~side', etc. Alternatively, one or more other parts may be located between the two parts unless'direct' is used.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are only used to distinguish one component from another component. Accordingly, the first component mentioned below may be the second component within the technical spirit of the present application.

In describing the components of the present application, terms such as first and second may be used. These terms are only for distinguishing the component from other components, and the nature, order, order, or number of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component, but different components between each component It will be understood that the "intervenes" may be, or each component may be "connected", "coupled" or "connected" through other components.

Each of the features of the various examples of the present application may be partially or totally combined or combined with each other, technically various interlocking and driving may be possible, and each of the examples may be independently implemented with respect to each other or may be implemented together in an associative relationship. .

Hereinafter, an example of a display device according to the present application will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, the same components may have the same reference numerals as possible even though they are displayed on different drawings.

1 is a schematic cross-sectional view of a display device according to an exemplary embodiment of the present application, and FIGS. 2A to 2J are schematic manufacturing process cross-sectional views of a display device according to an exemplary embodiment of the present application.

1 to 2J, a display device 1 according to an exemplary embodiment of the present application includes a substrate 2, a circuit element layer 3, a first electrode 4, a first bank 5, and an organic It includes a light emitting layer 6, a second electrode 7, an encapsulation layer 8, and a second bank (9). The organic light emitting layer 6 further includes a pattern portion.

The substrate 2 may be a plastic film, a glass substrate, or a semiconductor substrate such as silicon. The substrate 2 may be made of a transparent material or an opaque material.

On the substrate 2, a first sub-pixel 21, a second sub-pixel 22, and a third sub-pixel 23 are provided. The second sub-pixel 22 according to an example may be disposed adjacent to one side of the first sub-pixel 21. The third sub-pixel 23 according to an example may be disposed adjacent to one side of the second sub-pixel 22. Accordingly, the first sub-pixel 21, the second sub-pixel 22, and the third sub-pixel 23 may be sequentially disposed on the substrate 2.

Referring to FIG. 1, the first sub-pixel 21 emits red (R) light, the second sub-pixel 22 emits green (G) light, and the third sub-pixel 23 is It may be provided to emit blue (B) light, but is not limited thereto, and may emit light of various colors including white. In addition, the arrangement order of each of the sub-pixel regions 21, 22 and 23 can be variously changed.

Each of the first sub-pixel 21, the second sub-pixel 22, and the third sub-pixel 23 includes a first electrode 4, an organic emission layer 6, and a second electrode 7 It may be provided.

The display device 1 according to an exemplary embodiment of the present application is made of a so-called top emision method in which the emitted light is emitted toward the top, and thus, the material of the substrate 2 is not only transparent but also opaque One material can be used.

The circuit element layer 3 is provided on one surface of the substrate 2.

The circuit element layer 3 is provided with circuit elements including a plurality of thin film transistors 31, 32 and 33, various signal wires, and a capacitor for each sub-pixel region 21, 22, and 23. The signal wires may include a gate line, a data line, a power line, and a reference line, and the thin film transistors 31, 32, and 33 may include a switching thin film transistor, a driving thin film transistor, and a sensing thin film transistor. have. The sub-pixel regions 21, 22, and 23 are defined by a cross structure of gate lines and data lines.

The switching thin film transistor is switched according to a gate signal supplied to the gate line to supply a data voltage supplied from the data line to the driving thin film transistor.

The driving thin film transistor is switched according to the data voltage supplied from the switching thin film transistor to generate a data current from the power supplied from the power line and serves to supply the first electrode 4.

The sensing thin film transistor serves to sense a threshold voltage deviation of the driving thin film transistor that causes a deterioration in image quality, and the current of the driving thin film transistor is responsive to a sensing control signal supplied from the gate line or a separate sensing line. Is supplied to the reference line.

The capacitor serves to maintain the data voltage supplied to the driving thin film transistor for one frame, and is connected to a gate terminal and a source terminal of the driving thin film transistor, respectively.

The first transistor 31, the second transistor 32, and the third transistor 33 are arranged in the circuit element layer 3 for each sub-pixel 21, 22, 23. The first transistor 31 according to an example is connected to the first sub-electrode 41 disposed on the first sub-pixel 21 to drive light of a color corresponding to the first sub-pixel 21. Voltage can be applied.

The second transistor 32 according to an example is connected to the second sub-electrode 42 disposed on the second sub-pixel 22 to drive light of a color corresponding to the second sub-pixel 22. Voltage can be applied.

The third transistor 33 according to an example is connected to the third sub-electrode 43 disposed on the third sub-pixel 23 to drive light of a color corresponding to the third sub-pixel 23 Voltage can be applied.

Each of the first sub-pixel 21, the second sub-pixel 22, and the third sub-pixel 23 according to an example, the gate signal is input from the gate line using each of the transistors 31, 32, 33 When possible, a predetermined current is supplied to the organic light emitting layer according to the data voltage of the data line. Accordingly, the organic emission layers of the first sub-pixel 21, the second sub-pixel 22, and the third sub-pixel 23 may emit light with a predetermined brightness according to a predetermined current.

The first electrode 4 is formed on the circuit element layer 3. The first electrode 4 according to an example is a stacked structure of aluminum and titanium (Ti/Al/Ti), a stacked structure of aluminum and ITO (ITO/Al/ITO), an APC alloy, and a stacked structure of APC alloy and ITO It may be formed of a metal material having a high reflectance such as (ITO/APC/ITO). APC alloys are alloys of silver (Ag), palladium (Pb), and copper (Cu). The first electrode 4 may be an anode. The first electrode 4 may include a first sub-electrode 41, a second sub-electrode 42, and a third sub-electrode 43.

The first sub-electrode 41 may be provided in the first sub-pixel 21. The first sub-electrode 41 may be formed on the circuit element layer 3. The first sub-electrode 41 is connected to the source electrode of the first transistor 31 through a contact hole passing through the circuit element layer 3.

The second sub-electrode 42 may be provided in the second sub-pixel 22. The second sub-electrode 42 may be formed on the circuit element layer 3. The second sub-electrode 42 is connected to the source electrode of the second transistor 32 through a contact hole passing through the circuit element layer 3.

The third sub-electrode 43 may be provided in the third sub-pixel 23. The third sub-electrode 43 may be formed on the circuit element layer 3. The third sub-electrode 43 is connected to the source electrode of the third transistor 33 through a contact hole passing through the circuit element layer 3.

The display device 1 according to an exemplary embodiment of the present application is made of an upper emission method, and thus, the first to third sub-electrodes 41, 42 and 43 emit light emitted from the organic emission layer 6. It may include a reflective material for reflecting upward. In this case, the first to third sub-electrodes 41, 42, and 43 may be formed of a stacked structure of a transparent electrode formed of a transparent conductive material and a reflective electrode formed of the reflective material. Although not shown, a separate transparent electrode is additionally provided below the reflective electrode, so that each of the first to third sub-electrodes 41, 42, and 43 is a separate transparent electrode, a reflective electrode, and a transparent electrode in turn. It may be made of a stacked three-layer structure.

At this time, the reflective electrode provided in the first sub-pixel 21, the reflective electrode provided in the second sub-pixel 22, and the reflective electrode provided in the third sub-pixel 23 are all made of the same material. It may be formed to have the same thickness.

Similarly, the transparent electrode provided in the first sub-pixel 21, the transparent electrode provided in the second sub-pixel 22, and the transparent electrode provided in the third sub-pixel 23 are all made of the same material. It can be formed to have a thickness. However, the present invention is not limited thereto, and the thickness of the transparent electrodes provided in each of the sub-pixels 21, 22 and 23 to adjust the separation distance of the sub-electrodes 41, 42 and 43 with respect to the second electrode 7 May be different from each other. For example, when the display device is implemented using microcavity characteristics, the thickness of the transparent electrodes may be different from each other. The microcavity characteristic is that the distance between the reflective electrode of the first electrode 4 and the second electrode 7 is a half wavelength (λ/2) of light emitted from each sub-pixel (21, 22, 23). When it is an integer multiple, reinforcement interference occurs to amplify the light, and when the above reflection and re-reflection processes are repeated, the degree of amplification of light continuously increases, thereby improving the external extraction efficiency of light. When the display device is implemented to have micro-cavity characteristics, the second electrode 7 may include a translucent electrode.

Referring to FIG. 1 again, the first bank 5 is provided between the first sub-electrode 41 and the second sub-electrode 42. The first bank 5 according to an example is for distinguishing the first sub-pixel 21 from the second sub-pixel 22. The first bank 5 serves to define a sub-pixel, that is, a light emitting unit. In addition, since the region in which the first bank 5 is formed does not emit light, it may be defined as a non-light emitting unit. The first bank 5 is formed of an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamise resin, or a polyimide resin. Can be. The organic light emitting layer 6 is formed on the first electrode 4 and the first bank 5.

Referring to FIG. 1, the first bank 5 may include an upper surface 51 and an inclined surface 52. The inclined surface 52 may include a first inclined surface 521 and a second inclined surface 522.

The upper surface 51 of the first bank 5 is a surface positioned above the first bank 5.

The first inclined surface 521 of the first bank 5 is a surface extending from the upper surface 51 to the upper surface 41a of the first sub-electrode 41. Accordingly, the first inclined surface 521 and the upper surface 41a of the first sub-electrode 41 may form a predetermined angle. The predetermined angle may be 50° or more and less than 90° because the width of the bank is narrowed as the display device is implemented in high resolution. The width of the bank may be narrowed as the spacing between sub-pixels is narrowed.

The second inclined surface 522 of the first bank 5 is a surface extending from the upper surface 51 to the upper surface 42a of the second sub-electrode 42. Accordingly, the second inclined surface 522 and the upper surface 42a of the second sub-electrode 42 may form a predetermined angle. The angle formed by the second inclined surface 522 and the upper surface 42a of the second sub-electrode 42 is equal to the angle formed by the first inclined surface 521 and the upper surface 41a of the first sub-electrode 41. It can be the same.

Referring to FIG. 1, the display device 1 according to an exemplary embodiment of the present application may further include a second bank 9.

The second bank 9 is provided between the second sub-electrode 42 and the third sub-electrode 43. The second bank 9 according to an example is for distinguishing the second sub-pixel 22 from the third sub-pixel 23. The second bank 9 serves to define a sub-pixel, that is, a light emitting unit. In addition, the region where the second bank 9 is formed does not emit light, and thus may be defined as a non-light emitting unit. The second bank 9 may be formed of the same material as the first bank 5. The organic emission layer 6 is formed on the first electrode 4 and the second bank 9.

Referring to FIG. 1, the second bank 9 may include an upper surface 91 and an inclined surface 92. The inclined surface 92 may include a first inclined surface 921 and a second inclined surface 922.

The upper surface 91 of the second bank 9 is a surface positioned above the second bank 9.

The first inclined surface 921 of the second bank 9 is a surface extending from the upper surface 91 to the upper surface 42a of the second sub-electrode 42. Accordingly, the upper surface 42a of the first inclined surface 921 and the second sub-electrode 42 may form a predetermined angle. The predetermined angle may be 50° or more and less than 90° because the width of the bank is narrowed as the display device is implemented in high resolution.

The second inclined surface 922 of the second bank 9 is a surface extending from the upper surface 91 to the upper surface 43a of the third sub-electrode 43. Accordingly, the upper surface 43a of the second inclined surface 922 and the third sub-electrode 43 may form a predetermined angle. The angle formed by the second inclined surface 922 and the upper surface 43a of the third sub-electrode 43 is equal to the angle formed by the first inclined surface 921 and the upper surface 42a of the second sub-electrode 42. It can be the same.

The organic light emitting layer 6 is disposed on the first electrode 4. The organic light emitting layer 6 according to an example includes a hole transporting layer (HTL), a light emitting layer (EML), a hole blocking layer (HBL), and an electron transporting layer (ETL) It may include. The organic light emitting layer 6 may further include a hole injecting layer (HIL) and an electron injecting layer (EIL).

The hole injection layer (HIL), the hole transport layer (HTL), the electron transport layer (ETL), and the electron injection layer (EIL) of the organic light emitting layer 6 are intended to improve the luminous efficiency of the light emitting layer EML, and the hole transport layer (HTL) ) And the electron transport layer (ETL) are for balancing electrons and holes, and the hole injection layer (HIL) and electron injection layer (EIL) are for enhancing the injection of electrons and holes.

More specifically, the hole injection layer (HIL) may facilitate hole injection by lowering the injection energy barrier of holes injected from the anode material. The hole transport layer (HTL) serves to transport holes to the light emitting layer without loss of holes injected from the anode.

The emission layer (EML) is a layer that emits light through recombination of holes injected from the anode and electrons injected from the cathode, and can emit red, blue, and green light depending on the binding energy in the emission layer. It is also possible to form a white light emitting layer. The hole blocking layer (HBL) is provided between the light emitting layer (EML) and the electron transport layer (ETL) and serves to suppress the movement of holes that are not coupled with electrons in the light emitting layer (EML).

The electron transport layer (ETL) serves to transport electrons injected from the cathode to the light emitting layer. The electron injection layer (EIL) lowers the potential barrier during electron injection to facilitate injection of electrons from the cathode.

When a high potential voltage is applied to the first electrode 4 and a low potential voltage is applied to the second electrode 7, holes and electrons are moved to the light emitting layer through the hole transport layer and the electron transport layer, respectively, and the light emitting layers combine with each other to emit light. do.

The organic emission layer 6 may include a first organic emission layer 61, a second organic emission layer 62, and a third organic emission layer 63.

The first organic emission layer 61 may be disposed on the first sub-electrode 41. The first organic emission layer 61 may be formed on the first sub-electrode 41 after the first electrode 4, the first bank 5, and the second bank 9 are formed.

The first organic light emitting layer 61, as shown in Figure 1, a hole injection layer 611, a hole transport layer 612, a light emitting layer 613, a hole blocking layer 614, the electron transport layer 615, and electrons It may be provided, including the injection layer 616. The hole injection layer 611, the hole transport layer 612, the light emitting layer 613, the hole blocking layer 614, the electron transport layer 615, and the electron injection layer 616 is a first sub-pixel ( 21) may be formed sequentially.

Meanwhile, the hole injection layer 611, the hole transport layer 612, the electron transport layer 615, and the electron injection layer 616 of the first organic emission layer 61 may include the first sub pixel 21 as well as the second sub. It may be entirely deposited over the pixel 22 and the third sub-pixel 23. That is, the hole injection layer 611, the hole transport layer 612, the electron transport layer 615, and the electron injection layer 616 of the first organic emission layer 61 are the hole injection layers of the second organic emission layer 61 ( 621), the hole transport layer 622, the electron transport layer, and the electron injection layer are connected to each other, the hole injection layer 621 of the second organic light emitting layer 61, the hole transport layer 622, the electron transport layer, and the electron injection layer Silver may be connected to each of the hole injection layer 631, the hole transport layer 632, the electron transport layer, and the electron injection layer of the third organic light emitting layer (63).

Therefore, the hole injection layer 611, the hole transport layer 612, the electron transport layer 615, and the electron injection layer 616 of the first organic emission layer 61, the second organic emission layer 62 as shown in Figure 1 ) May be a hole injection layer 621, a hole transport layer 622, an electron transport layer, and an electron injection layer, and a hole injection layer 631, a hole transport layer 632, and an electron transport layer of the third organic light emitting layer 63 , And an electron injection layer. As a result, the hole injection layer 611, the hole transport layer 612, the electron transport layer 615, and the electron injection layer 616 of the first organic emission layer 61 are the display device (1) according to an embodiment of the present application ) In a common layer.

The hole injection layer 611, the hole transport layer 612, the electron transport layer 615, and the electron injection layer 616 of the first organic emission layer 61 are disposed as a common layer, and thus the first sub-pixel 21 and The first bank 5 disposed between the second sub-pixels 22 may be covered, and the second bank 9 disposed between the second sub-pixels 22 and the third sub-pixels 23 may be covered. have.

Meanwhile, in the light emitting layer 613 and the hole blocking layer 614 of the first organic light emitting layer 61, the hole injection layer 611 and the hole transport layer 612 of the first organic light emitting layer 61 are deposited as a common layer. The first sub-pixel 21 may be patterned and formed. After the light emitting layer 613 and the hole blocking layer 614 are deposited and patterned on the hole transport layer 612 of the first organic emission layer 61, the electron transport layer 615 and the electron injection of the first organic emission layer 61 are patterned. Layer 616 may be deposited as a common layer. Therefore, the electron transport layer 615 and the electron injection layer 616 of the first organic emission layer 61 may be provided in a structure that covers the emission layer 613 and the hole blocking layer 614.

Referring to FIG. 1, the second organic emission layer 62 may be disposed on the second sub-electrode 42. The second organic light emitting layer 62, like the first organic light emitting layer 61, after the first electrode 4, the first bank 5, and the second bank 9 are formed, the second sub-electrode 42 ).

The second organic light emitting layer 62 may include a hole injection layer 621, a hole transport layer 622, a light emitting layer 623, a hole blocking layer 624, an electron transport layer, and an electron injection layer. The hole injection layer 621, the hole transport layer 622, the electron transport layer, and the electron injection layer of the second organic light emitting layer 62 are sequentially formed in the second sub-pixel 22, as described above The hole injection layer 611, the hole transport layer 612, the electron transport layer, and the electron injection layer of the first organic light emitting layer 61 may be connected to each of them and be disposed as a common layer.

The light emitting layer 623 and the hole blocking layer 624 of the second organic light emitting layer 62 are the second hole after the hole injection layer 621 and the hole transport layer 622 of the second organic light emitting layer 62 are deposited as a common layer. The sub-pixel 22 may be patterned and formed. After the light emitting layer 623 and the hole blocking layer 624 are deposited and patterned on the hole transport layer 622 of the second organic light emitting layer 62, the electron transport layer and the electron injection layer of the second organic light emitting layer 62 are common It can be deposited as a layer. Therefore, the electron transport layer and the electron injection layer of the second organic light emitting layer 62 may be provided in a structure that covers the light emitting layer 623 and the hole blocking layer 624.

The third organic emission layer 63 may be disposed on the third sub-electrode 43. The third organic light emitting layer 63, like the first organic light emitting layer 61, after the first electrode 4, the first bank 5, and the second bank 9 are formed, the third sub-electrode 43 ).

The third organic light emitting layer 63 may include a hole injection layer 631, a hole transport layer 632, a light emitting layer 633, a hole blocking layer 634, an electron transport layer, and an electron injection layer. The hole injection layer 631, the hole transport layer 632, the electron transport layer, and the electron injection layer of the third organic emission layer 63 are sequentially formed in the third sub-pixel 23, as described above. The hole injection layer 621 of the second organic light emitting layer 62, the hole transport layer 622, the electron transport layer, and the electron injection layer may be connected to each of the common layers to be disposed.

The light emitting layer 633 and the hole blocking layer 634 of the third organic light emitting layer 63 are the third hole after the hole injection layer 631 and the hole transport layer 632 of the third organic light emitting layer 63 are deposited as a common layer. It may be formed by patterning on the sub-pixel 23. After the light emitting layer 633 and the hole blocking layer 634 are deposited and patterned on the hole transport layer 632 of the third organic light emitting layer 63, the electron transport layer and the electron injection layer of the third organic light emitting layer 63 are common It can be deposited as a layer. Therefore, the electron transport layer and the electron injection layer of the third organic light emitting layer 63 may be provided in a structure that covers the light emitting layer 633 and the hole blocking layer 634.

Accordingly, the display device 1 according to an exemplary embodiment of the present application includes the light emitting layers 613, 623, 633 and the hole blocking layer 614 that are patterned and disposed in each of the first to third sub pixels 21, 22, and 23. , 624, 634) are spaced apart from each other, so that even if the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer are provided as common layers connected to each other, each of the first to third sub-pixels 21, 22, 23 It can emit light of different colors. For example, the first sub-pixel 21 emits red (R) light, the second sub-pixel 22 emits green (G) light, and the third sub-pixel 23 emits blue (B) light. It may be provided to emit light. However, the present invention is not limited thereto, and light of various colors may be emitted.

Each of the first organic emission layer 61, the second organic emission layer 62, and the third organic emission layer 63 emits red (R) light, green (G) light, and blue (B) light. When provided, the arrangement order of the organic light emitting layers 61, 62, 63 with respect to the first sub-electrodes 41, 42, 43 may be variously combined. Each of the first organic emission layer 61, the second organic emission layer 62, and the third organic emission layer 63 emits red (R) light, green (G) light, and blue (B) light. Accordingly, since the display device 1 according to an exemplary embodiment of the present application may not use a color filter, an effect of reducing manufacturing cost can be expected.

As described above, the light emitting layers 613, 623, and 633 and the hole blocking layers 614, 624, and 634 of each of the plurality of organic light emitting layers 61, 62, and 63 have first to third sub-pixels 21, 22. , 23) may be patterned for each star. More specifically, each of the light emitting layers 613, 623, and 633 and the hole blocking layers 614, 624, and 634 are sequentially stacked on the hole transport layers 612, 622, and 632 of each sub-pixel, and the hole blocking layer ( After the shield layer SL and photoresist PR are laminated on 614, 624, and 634, each sub-pixel is processed through a photo process, PR removal process, dry etching process, and lift-off process. It may be formed by patterning (21, 22, 23).

Here, in the process of removing the shield layer (SL) and the photoresist (PR) disposed on the hole blocking layer (614, 624, 634) using a stripper solution (shield) SL and the photoresist ( When PR) is not completely removed and remains in the form of a residual film, the light emitting layers 613, 623, and 633 not only block light emitted from light, but also act as a barrier that hinders the movement of electrons, thereby deteriorating device characteristics.

In the display device 1 according to an exemplary embodiment of the present application, the hole blocking layers 614, 624, and 634 in contact with the shield layer SL are provided to include pattern portions having an uneven pattern, so that the hole blocking layers 614, 624, Shield layer SL and photoresist PR may be easily removed from 634. Accordingly, the display device 1 according to an exemplary embodiment of the present application does not leave any residues of the shield layer SL and the photoresist PR on the hole blocking layers 614, 624, and 634, so that the light emitting layer 613, 623 and 633) can be prevented from being deteriorated. A detailed description of this will be specifically described once again when describing a manufacturing process of the display device 1 according to an embodiment of the present application.

Referring to FIG. 1 again, the second electrode 7 is disposed on the organic emission layer 6. The second electrode 7 according to an embodiment is a common layer formed in common with the first sub-pixel 21, the second sub-pixel 22, and the third sub-pixel 23. The second electrode 7 is a transparent conductive material (TCO, transparent conductive material) such as ITO or IZO that can transmit light, or magnesium (Mg), silver (Ag), or magnesium (Mg) and silver (ag) It may be formed of a semi-transmissive conductive material such as an alloy of.

An encapsulation layer 8 may be formed on the second electrode 7. The encapsulation layer 8 serves to prevent oxygen or moisture from penetrating the organic light emitting layer 6 and the second electrode 7. To this end, the encapsulation layer 8 may include at least one inorganic layer and at least one organic layer.

For example, the encapsulation layer 8 may include a first inorganic film, an organic film, and a second inorganic film. In this case, the first inorganic film is formed to cover the second electrode 7. The organic film is formed to cover the first inorganic film. The organic film is preferably formed to a sufficient length to prevent particles from entering the organic light emitting layer 6 and the second electrode 7 through the first inorganic film. The second inorganic film is formed to cover the organic film.

In FIG. 1, only the encapsulation layer 8 disposed on the second electrode 7 is illustrated for convenience of description. When the organic light emitting layer includes red, green and blue organic light emitting layers that emit red (R), green (G) and blue (B) light, the red, green and blue color filters are the encapsulation layer 8 It may not be placed on.

2A to 2J are schematic manufacturing process cross-sectional views of a display device according to an exemplary embodiment of the present application. In the display device 1 according to an exemplary embodiment of the present application, the shield layer SL and the photoresist PR are easily formed from the pattern portions of the hole blocking layers 614, 624, and 634 through the following manufacturing process. It may be provided to be removed so as to prevent deterioration of device characteristics of the light emitting layers 613, 623, and 633.

2A and 2B, in a state in which a first electrode 4, a first bank 5, and a second bank 9 are formed on the substrate 2 and the circuit element layer 3, The first to third sub-pixels 21, 22, and 23 sequentially form the hole injection layer 611, the hole transport layer 612, the light emitting layer 613, and the hole blocking layer 614 of the first organic emission layer 61. It is deposited over the entire surface.

Referring to FIG. 2C, a pattern portion is formed on an upper surface of the hole blocking layer 614. As illustrated in FIG. 1, the pattern part may include a first pattern part 6161 formed on the first organic light emitting layer 61, a second pattern part 6251 formed on the second organic light emitting layer 62, and a third A third pattern portion 631 formed on the organic emission layer 63 may be included. The display device 1 according to an embodiment of the present application is described as an example in which the first to third pattern portions 6161, 6241, and 6341 are sequentially formed, but are not limited thereto.

Referring back to FIG. 2C, the first pattern portion 6161 having an uneven shape is formed on the top surface of the hole blocking layer 614 deposited on the first to third sub-pixels 21, 22 and 23 by a dry etching process. Can form. For example, the first pattern portion 6161 may be formed in at least one of a triangular shape and a hemispherical shape. At least one of a triangle and a hemispherical shape by partially adjusting the time at which the top surface of the hole blocking layer 614 is exposed to the etching gas used in the dry etching process, or the pressure of the etching gas sprayed on the top surface of the hole blocking layer 614 The first pattern portion 6161 may be formed in one form. The first pattern portion 6161 may have a plurality of triangles adjacent to each other, or a plurality of hemispherical shapes adjacent to each other, or a plurality of triangles or a plurality of hemispherical shapes may be discontinuous. The first pattern portion 6161 is not limited to the above-described form, and may be provided in other forms.

2D to 2F, after sequentially applying the shield layer SL and the PR layer on the first pattern portion 6161 of the hole blocking layer 614, the light emitting layer 613 of the first organic emission layer 61 ) And a hole (M, shown in FIG. 2E) are positioned so that the opening is positioned where the hole blocking layer 614 is to be patterned, and then the portion to be patterned is exposed through the opening. Accordingly, in the PR layer, a region in which the light emitting layer 613 and the hole blocking layer 614 of the first organic light emitting layer 61 are patterned may have properties that are not etched by the developer. Accordingly, when the primary removal process of removing the PR layer using the developer is performed, the PR layer remains on the first sub-pixel 21 without being etched as shown in FIG. 2F. The PR layer may be a photoresist layer.

Next, referring to FIG. 2G, the remaining sub-pixels 22 and 23 including the first sub-pixel 21 for patterning the light-emitting layer 613 and the hole blocking layer 614 of the first organic emission layer 61 A second removal process of removing the shield layer SL, the hole blocking layer, and the light emitting layer by etching using an etching gas or by using a stripper solution to lift off (Lift-off) is performed. In the secondary removal process, a hole blocking layer including the shield layer SL and a portion of the light emitting layer may be removed by increasing the time exposed to the etching gas or the time immersed in the stripper solution compared to the primary removal process. . At this time, the time to be exposed to the etching gas or the time to be immersed in the stripper solution can be adjusted in a range that does not damage the hole transport layer 612. Accordingly, as illustrated in FIG. 2G, the first evaporated layer 613, the hole blocking layer 614, and the first pattern portion 6141 of the hole blocking layer 614 are only on the first sub-pixel 21. It can be patterned to remain. Meanwhile, since the light emitting layer 613 and the hole blocking layer 614 of the first organic light emitting layer 61 are simultaneously patterned by a stripper solution, the light emitting layer 613 and the hole blocking layer 614 of the first organic light emitting layer 61 are Both ends of the can be formed to coincide with each other. The display device 1 according to an exemplary embodiment of the present application is simultaneously patterned so that both ends of the light emitting layer 613 and the hole blocking layer 614 of the first organic light emitting layer 61 coincide with each other, so that the light emitting layer and the hole blocking layer are It may be provided to reduce the number of manufacturing processes compared to the case of each patterning.

Meanwhile, an aqueous stripper solution may be used as a stripper solution for removing the shield layer SL from the first pattern portion 6161. The aqueous stripper solution is less expensive than the fluorine stripper solution at about 1/10. For example, the aqueous stripper solution may be water. Therefore, the display device 1 according to an embodiment of the present application can reduce the process cost of removing the shield layer SL compared to the case of using a fluorine-based stripper solution, thereby reducing the overall manufacturing cost.

Since the display device 1 according to an embodiment of the present application uses an aqueous stripper solution, the manufacturing cost can be reduced, and the first pattern portion 6141 is disposed between the hole blocking layer 614 and the shield layer SL. By providing it, it is possible to prevent the residue of the shield layer SL from remaining on the hole blocking layer 614. A detailed description of the first pattern portion 6161 will be described later.

Next, referring to FIG. 2H, the display device 1 according to an exemplary embodiment of the present application is repeatedly performed by the processes of FIGS. 2B to 2G described above, and thus the upper surface 42a of the second sub-electrode 42 A hole injection layer 611, a hole transport layer 612, and a light emitting layer of a second organic light emitting layer 62 patterned to coincide at both ends of the hole transport layer 612 of the first organic light emitting layer 61 deposited on the surface 623 and a hole blocking layer 624 may be formed. The hole blocking layer 624 of the second organic light-emitting layer 62 may include a second pattern portion 6251, and the second pattern portion 6251 may have the same shape as the first pattern portion 6161 described above. It may be provided with. Similarly, a hole injection layer 611 and a hole transport layer 612 of the first organic emission layer 61 deposited on the front surface 43a of the third sub-electrode 43 are disposed, and on the hole transport layer 612 A light emitting layer 633 and a hole blocking layer 634 of the third organic light emitting layer 63 patterned to coincide at both ends thereof may be formed. The hole blocking layer 634 of the third organic light emitting layer 63 may include a third pattern portion 6321, and the third pattern portion 6321 may include the first and second pattern portions 6161, 6241).

When the above-described processes of FIGS. 2B to 2G are repeatedly performed, in 2B, the first organic electrode is sequentially deposited from the hole injection layer 611 of the first organic emission layer 61 on the first sub-electrode 41. Since the hole injection layer 611 and the hole transport layer 612 of the light emitting layer 61 are provided as a common layer over the first to third sub pixels 21, 22, and 23, the second on the second sub electrode 42 Deposition may be started from the emission layer 623 of the organic emission layer 62, and deposition may be started from the emission layer 633 of the third organic emission layer 63 on the third sub-electrode 43.

Next, referring to FIGS. 2I and 2J, the display device 1 according to an exemplary embodiment of the present application includes the light emitting layer 613, the hole blocking layer 614, and the first pattern unit (1) of the first organic light emitting layer 61. 6141), the light emitting layer 623 of the second organic light emitting layer 62, the hole blocking layer 624, the second pattern portion 6161, and the light emitting layer 633, the hole blocking layer 634 of the third organic light emitting layer 63 ), the electron transport layer 615, the electron injection layer 616, the second electrode 7, and the encapsulation layer 8 are sequentially deposited on the entire surface to cover the second pattern portion 6321, thereby partially completing the manufacturing process. Can be.

Here, the hole injection layer 611, the hole transport layer 612, the electron transport layer 615, and the electron injection layer 616 of the first organic emission layer 61 are the first sub-pixel 21, the second sub-pixel 22 ), and since it is a common layer deposited over the entirety of the third sub-pixel 23, it may be a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer of the second organic emission layer 62, and a third organic emission layer It may be a hole injection layer (63), a hole transport layer, an electron transport layer, an electron injection layer.

Meanwhile, the electron transport layer 615 that is entirely deposited over the first to third sub-pixels 21, 22, and 23 includes the first pattern part 6161, the second pattern part 6421, and the third pattern The upper surface and side surfaces of each of the parts 6321 may be disposed to cover both side surfaces of each of the light emitting layers 613, 623, and 633.

In the display device 1 according to an exemplary embodiment of the present application, the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer of the organic light emitting layer 6 are all of the first to third sub-pixels 21, 22, and 23. By providing a common layer to cover, the number of manufacturing processes can be reduced compared to the case of patterning a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer for each sub-pixel, thereby reducing the tact time of the completed display device. Can have

On the other hand, as shown in Figure 2j, the light emitting layer 613 of the first organic light emitting layer 61, the hole blocking layer 614, and the first pattern portion 6161, the light emitting layer of the second organic light emitting layer 62 ( 623), the hole blocking layer 624, and the second pattern portion 6251 may be spaced apart from each other. Accordingly, even when an electric field is formed between the first sub-electrode 41 and the second electrode 7, no leakage current is generated toward the second sub-pixel 22, so that the second sub-pixel 22 does not emit light. Can be. Likewise, even if an electric field is formed between the second sub-electrode 42 and the second electrode 7, no leakage current is generated toward the first sub-pixel 21, so that the first sub-pixel 21 may not emit light. have.

In addition, the light emitting layer 633, the hole blocking layer 634, and the third pattern portion 631 of the third organic light emitting layer 63 include the light emitting layer 623 and the hole blocking layer 624 of the second organic light emitting layer 62 ), and the second pattern portion 6251 may be spaced apart from each other. Accordingly, even if an electric field is formed between the third sub-electrode 43 and the second electrode 7, no leakage current is generated toward the second sub-pixel 22, so that the second sub-pixel 22 does not emit light. Can be.

As a result, the display device 1 according to an embodiment of the present application is provided so that the light emitting layers, the hole blocking layers, and the pattern portions of the first to third organic light emitting layers 61, 62, and 63 are spaced apart from each other. Mixing between adjacent sub-pixels emitting color light can be prevented.

3 is an enlarged view of part A of FIG. 2G showing that the water-based stripper is in contact with the pattern portion in the display device according to an embodiment of the present application, and FIG. 4A is the water-based stripper in the display device according to an embodiment of the present application 3 is a schematic illustration of the contact angle of the pattern part and the width of the pattern part, and FIG. 4B is an exemplary view for explaining the reduction of the contact angle of the water-based stripper and the pattern part according to the reduction of the width of the pattern part.

2G and 3, when the shield layer SL is removed from the hole blocking layer 614 using water as an aqueous stripper, as shown in FIG. 3, the water molecule W has a first pattern portion ( 6141). The display device 1 according to an exemplary embodiment of the present application is provided with the first pattern portion 6161 in at least one of a triangle and a hemispherical shape to easily remove the shield layer SL from the hole blocking layer 614. Can be. FIG. 3 illustrates an example of a first pattern portion 6161 provided in a continuous shape with a plurality of triangles adjacent to each other.

The first pattern portion 6161 may include a plurality of protrusions 6161a and a plurality of insertion portions 6161.

The plurality of protrusions 6161a protrude upward from the upper surface of the body portion 614a of the hole blocking layer 614. The body portion 614a is a portion in contact with the top surface of the light emitting layer 613 in the hole blocking layer 614. The upper side means a side opposite to the side on which the light emitting layer 613 is disposed based on the main body portion 614a. As illustrated in FIG. 3, the size of each of the plurality of protrusions 6161a may be reduced toward the upper side. Accordingly, since the area where the water molecules W contact each end of each of the plurality of protrusions 6161a becomes small, the water molecules W can be easily removed from each of the protrusions 6161a. A baking time of about 24 hours is required to remove water molecules from the hole blocking layer in a general flat state where the plurality of protrusions are not provided, but a display device according to an embodiment of the present application having a plurality of protrusions 6161a When (1) is used, water molecules W can be sufficiently removed from the protrusions 6161a in about 8 hours, which is 1/3 of the normal baking time. Therefore, when the display device 1 according to an embodiment of the present application is used, it is possible to significantly reduce the tact time required to manufacture the completed display device.

The plurality of insertion portions 6161b may be disposed between the protrusions 6161a. The size of each of the insertion portions 6161b may be formed to decrease from the upper side to the lower side. As described in the above-described manufacturing process, the shield layer SL is deposited from the first pattern portion 6141 by the aqueous stripper solution used in a subsequent process after being deposited to cover the top surface of the first pattern portion 6161. do. Therefore, the organic material constituting the shield layer SL may be inserted into each of the insertion portions 6161b while simultaneously covering the protrusions 6161a. At this time, since each of the insertion portions 6161b is filled with a small amount of gas, for example, at least one of oxygen (O ₂ ) and argon (Ar), when the organic material of the shield layer SL is inserted, the insertion In each of the portions 6161b, a gas and an organic material of the shield layer SL may coexist. Therefore, the display device 1 according to an exemplary embodiment of the present application is provided so that the shield layer SL and the gas are filled in the insert portion 6161b, compared to the case where only the shield layer is filled or there is no insert portion. (SL) can have an effect that can be easily removed from the hole blocking layer (614).

Meanwhile, an organic material constituting the electron transport layer 615 may be inserted in a subsequent process after the shield layer SL is removed from the insertion portions 6161b. In this process, by implementing the inside of the chamber for depositing the electron transport layer 615 in a vacuum state, it prevents the gas from being filled in each of the insertion portions 6161b, thereby binding the hole blocking layer 614 and the electron transport layer 615 At the same time, it is possible to prevent the formation of gaps that hinder the movement of electrons.

Referring to FIG. 3 again, the width L and the height H of each of the protrusions 6161a may be proportional. Here, the width L of the protruding portion 6161a means the length of the protruding portion 6161a contacting the main body portion 614a, and the height H of the protruding portion 6161a is the body portion 614a from the protruding portion 6161a It means the length from the part contacting with to the end in the upward direction. Accordingly, the width L may be in the horizontal direction based on FIG. 3, and the height H may be in the vertical direction based on FIG. 3. The wider the width L, the larger the area supported by the body portion 614a, so that the height H can be increased. When the height H is increased, the size of each of the insertion portions 6161b increases, so the volume of the gas filled in each of the insertion portions 6161b can be increased. In this case, since the shield layer SL can be more easily removed as described above, device characteristics of the organic light emitting layer 6 are prevented by preventing the residue of the shield layer SL from remaining on the hole transport layer 614. It can further prevent the fall. However, if the width (L) is too wide, it is possible to insert not only gas but also water molecules (W) into the insertion portion (6141b), rather, it is more preferable to remove the water molecules (W) from the first pattern portion (6141) It can be difficult.

Therefore, the width of each of the protrusions 6161a may be provided with 300 nm-600 nm. For example, as shown in FIG. 4A, when the width L1 of each of the protrusions 6161a is provided with 300 nm-600 nm, the water molecule W is placed on the top of the protrusion 6161a, so-called structure. Cassie-baxter's model can be implemented. In this case, the contact angle θ formed between the tangent line of the spherical water molecule W and the upper surface of the protrusion 6161a may be 150° or more, and preferably between 150°-170°. FIG. 4A schematically shows a portion A of FIG. 3, and when the portion A of FIG. 3 is further enlarged, the top end of the protrusion 6161a has a flat shape, so that the tangent of the spherical water molecule W and the top surface of the protrusion 6161 The end can achieve a predetermined contact angle.

Since water molecules W are placed on the upper side of the protrusions 6161a as shown in FIG. 4A, the contact area between the water molecules W and the protrusions 6161 is small, so that the water molecules W are easily protruded by baking. ). In addition, since the gas may be filled in the insertion portion 6161b disposed between the water molecule W and the body portion 614a, the water molecule W can be more easily removed from the protrusion 6161a.

On the other hand, as shown in Figure 4b, if the water molecule (W) is not placed on the protrusion and the so-called Wenzel state in which the structure is in contact with the hole blocking layer is implemented, the contact area between the water molecule (W) and the hole transport layer may be increased. If the baking time in the Wenzel state is 24 hours, the manufacturing method of the display device 1 according to an exemplary embodiment of the present application has a small contact area between the water molecules W and the protrusions 6161a, so that the protrusions are about 8 hours. Since water molecules (W) can be sufficiently removed from (6141a), the manufacturing process time can be reduced.

In FIG. 4B, 100 corresponds to the light emitting layer 613 of the present application, 101 corresponds to the body portion 614a of the hole blocking layer of the present application, 102 corresponds to the first pattern part 6161 of the present application, 102a may correspond to the protrusion 6161 of the present application, and 102b may correspond to the insertion portion 6161 of the present application.

As shown in Figure 4b, the width (L2) of the protrusion (102a) is smaller than the width (L1) of the protrusion (6141a) of the present application, because the width (L2) of the protrusion (102a) is small water molecules (W ) May be placed on the body portion 101 without being placed on the protruding portion 102a. Accordingly, in the Wenzel state, not only is the contact area between the water molecule W and the hole blocking layer 101 large, but also has a structure in which a gas cannot be filled between the water molecule W and the hole blocking layer 101. Here, the contact angle θ1 between the tangent line of the spherical water molecule W and the upper surface of the protrusion 102a is less than 150°, which is smaller than the contact angle θ of the present application. As a result, since the display device 1 according to an exemplary embodiment of the present application has a Cassie-baxter's model structure as shown in FIG. 4A, the body portion 614a of the hole blocking layer 614 than the structure in the Wenzel state shown in FIG. 4B ) And the first pattern portion 6161 to easily remove the water molecules (W).

When the width L1 of each of the protrusions 6161a is provided to be less than 300 nm, the contact angle becomes too small to increase the contact area between the hole blocking layer and the water molecule W, so the water molecule W from the hole blocking layer There is a problem in that the baking time is prolonged because it cannot be easily removed.

When the width L1 of each of the protrusions 6161a is provided in excess of 600 nm, the contact angle may be too large, and the size of the insertion portion disposed between the hole blocking layer and the water molecule W may be increased. In this case, since the water molecules W are filled up to the insertion portion, the contact area of the water molecules W in contact with the hole blocking layer becomes larger, so that the baking time becomes longer.

Therefore, in the display device 1 according to an embodiment of the present application, the width of each of the protrusions 6161a is 300 nm-600 nm, so that water molecules W are placed on the upper side of the protrusions 6161a Cassie-baxter's By implementing the model, it can be provided to reduce the baking time for removing the water molecules (W) from the projection (6141a).

In addition, the display device 1 according to an embodiment of the present application can reduce the contact area between the water molecules W and the protrusions 6161a, so that the water from the protrusions 6161a at a temperature lower than the typical baking temperature of 100°C. It may be provided to remove the molecule (W). Since the display device 1 according to an embodiment of the present application is provided to remove water molecules W at a temperature lower than 100° C., compared to the case where the water molecules W are removed at 100° C. Since the applied heat can be reduced, damage to the light emitting layer 613 due to heat can be further prevented.

5A to 5C relate to a display device according to another exemplary embodiment of the present application, which relates to a head mounted display (HMD) device.

5A to 5C relate to a display device according to another exemplary embodiment of the present application, which relates to a head mounted display (HMD) device. 5A is a schematic perspective view, FIG. 5B is a schematic plan view of a VR (Virtual Reality) structure, and FIG. 5C is a schematic cross-sectional view of an Augmented Reality (AR) structure.

5A, the head mounted display device according to the present application includes a storage case 10 and a head mounting band 12.

The storage case 10 houses components such as a display device, a lens array, and an eyepiece therein.

The head mounting band 12 is fixed to the storage case 10. The head mounting band 12 is exemplified to be formed so as to surround the user's head and both sides, but is not limited thereto. The head mounting band 12 is for fixing the head mounted display to the user's head, and may be replaced with a frame or a helmet-shaped structure.

As can be seen from FIG. 5B, the head mounted display device 1 having a VR (Virtual Reality) structure according to the present application includes a display device 2a for the left eye, a display device 2b for the right eye, a lens array 11, and a left eye. The eyepiece 20a and the right eyepiece 20b may be included.

The left-eye display device 2a, the right-eye display device 2b, the lens array 11, and the left-eye eye lens 20a and the right-eye eye lens 20b are housed in the aforementioned storage case 10. .

The left-eye display device 2a and the right-eye display device 2b may display the same image, in which case the user can watch the 2D image. Alternatively, the left-eye display device 2a may display the left-eye image and the right-eye display device 2b may display the right-eye image, in which case the user can view a stereoscopic image. Each of the display device 2a for the left eye and the display device 2b for the right eye may be formed of the display devices according to FIGS. 1 to 4A described above. For example, each of the left-eye display device 2a and the right-eye display device 2b may be an organic light emitting display.

The left-eye display device 2a and the right-eye display device 2b each include a plurality of sub-pixels, a circuit element layer 3, a first electrode 4, a first bank 5, an organic light emitting layer 6, A pattern unit, a second electrode 7, an encapsulation layer 8, and a second bank 9 may be included, and various colors may be displayed by combining the color of light emitted from each sub-pixel in various ways. .

The lens array 11 may be provided between the left eyepiece lens 20a and the left eye display device 2a while being spaced apart from each of the left eyepiece lens 20a and the left eye display device 2a. That is, the lens array 11 may be located in front of the left eyepiece 20a and behind the left eye display 2a. In addition, the lens array 11 may be provided between the right-eye eye lens 20b and the right-eye display device 2b while being spaced apart from each of the right-eye eye lens 20b and the right-eye display device 2b. have. That is, the lens array 11 may be located in front of the right-eye eyepiece lens 20b and behind the right-eye display device 2b.

The lens array 11 may be a micro lens array. The lens array 11 may be replaced with a pin hole array. The image displayed on the left-eye substrate 2a or the right-eye substrate 2b due to the lens array 11 may be enlarged to the user.

The left eye LE of the user may be located in the left eyepiece 20a, and the right eye RE of the user may be located in the right eyepiece 20b.

As can be seen in Figure 5c, the head mounted display device of the AR (Augmented Reality) structure according to the present invention is a left-eye display device (2a), a lens array 11, a left eyepiece (20a), a transmissive reflector (13) , And a transmission window (14). For convenience, only the left eye configuration is shown in FIG. 5C, and the right eye configuration is the same as the left eye configuration.

The left-eye display device 2a, the lens array 11, the left-eye eyepiece 20a, the transmissive reflecting portion 13, and the transmissive window 14 are accommodated in the aforementioned storage case 10.

The display device 2a for the left eye may be disposed on one side, for example, an upper side of the transmission reflection part 13 without covering the transmission window 14. Accordingly, the left eye display device 2a may provide an image to the transmissive reflector 13 without obscuring the external background seen through the transmissive window 14.

The left-eye display device 2a may be formed of the electroluminescent display device according to FIGS. 1 to 4A described above. At this time, in FIG. 1 to FIG. 4A, an upper portion corresponding to a surface on which an image is displayed, for example, an encapsulation layer 8 or a color filter layer (not shown) faces the transmissive reflector 13.

The lens array 11 may be provided between the left eyepiece 20a and the transmissive reflector 13.

The left eye of the user is located in the left eyepiece 20a.

The transmission reflection part 13 is disposed between the lens array 11 and the transmission window 14. The transmission reflection part 13 may include a reflection surface 13a that transmits a part of light and reflects another part of light. The reflective surface 13a is formed such that an image displayed on the left eye display device 2a proceeds to the lens array 11. Accordingly, the user can view both the external background and the image displayed by the left-eye display device 2a through the transmission window 14. That is, since the user can view the virtual image and the background of the reality as a single image, augmented reality (AR) can be implemented.

The transmission window 14 is disposed in front of the transmission reflection unit 13.

The present application described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which this application belongs that various substitutions, modifications, and changes are possible without departing from the spirit of the present application. It will be obvious to those who have the knowledge of Therefore, the scope of the present application is indicated by the claims to be described later, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted to be included in the scope of the present application.

1: Display device
2: Substrate 3: Circuit element layer
4: First electrode 5: Bank
6 organic light emitting layer 7 second electrode
8: Encapsulation layer 9: Second bank
10: storage case 11: lens array
12: head mounting band 6141: first pattern portion
6241: second pattern portion 6341: third pattern portion

Claims (18)

A substrate having a first sub-pixel and a second sub-pixel adjacent to the first sub-pixel;
A first electrode provided on the substrate and including a first sub-electrode provided in the first sub-pixel, and a second sub-electrode provided in the second sub-pixel;
An organic emission layer including a first organic emission layer disposed on the first sub-electrode and a second organic emission layer disposed on the second sub-electrode;
A second electrode disposed on the organic light emitting layer; And
A first bank is provided between the first sub-electrode and the second sub-electrode to distinguish the first sub-pixel and the second sub-pixel,
The first organic light emitting layer includes a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer,
The hole blocking layer is a display device including a first pattern portion provided between the electron transport layer. According to claim 1,
The second organic light emitting layer includes a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer,
The hole blocking layer of the second organic light emitting layer includes a second pattern portion provided between the electron transport layer of the second organic light emitting layer,
A display device spaced apart from the light emitting layer, the hole blocking layer, and the first pattern portion of the first organic light emitting layer and the light emitting layer, the hole blocking layer, and the second pattern portion of the second organic light emitting layer. According to claim 2,
The hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer of the first organic emission layer are connected to each other with the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer of the second organic emission layer so as to cover the first bank. Display device. According to claim 1,
A display device having both ends of the light emitting layer and the hole blocking layer of the first organic light emitting layer coinciding with each other. According to claim 1,
The first pattern portion is a display device provided in at least one of a triangle and a hemispherical shape. According to claim 1,
The hole blocking layer of the first organic light emitting layer includes a body portion in contact with the top surface of the light emitting layer,
The first pattern portion is a display device in contact with the upper surface of the body portion. The method of claim 6,
The first pattern portion includes a plurality of protruding portions projecting upward from the upper surface of the body portion,
The size of each of the protrusions is reduced to the upper side display device. The method of claim 7,
A display device in which the width and height of each of the protrusions are proportional. The method of claim 8,
The width of each of the protrusions is 300 nm-600 nm display device. The method of claim 7,
The first pattern portion includes a plurality of insertion portions disposed between the protrusions,
A display device in which the size of each of the insertion portions decreases from an upper side to a lower side. The method of claim 10,
A display device in which the organic material of the electron transport layer is inserted after the organic material of the shield layer is inserted and removed in the insertion part. According to claim 1,
The substrate includes a third sub-pixel adjacent to the second sub-pixel,
The first electrode is provided on the substrate, and includes a third sub electrode provided in the third sub pixel,
The organic emission layer includes a third organic emission layer disposed on the third sub-electrode,
The first organic light emitting layer, the second organic light emitting layer, and the third organic light emitting layer, red (R) light, green (G) light, and blue (B) light, respectively. The method of claim 12,
The third organic light emitting layer includes a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer,
The hole blocking layer of the third organic light emitting layer includes a third pattern portion provided between the electron transport layer of the third organic light emitting layer,
A display device spaced apart from the light emitting layer, the hole blocking layer, and the third pattern portion of the third organic light emitting layer and the light emitting layer, the hole blocking layer, and the second pattern portion of the second organic light emitting layer. The method of claim 14,
A second bank provided between the second sub-electrode and the third sub-electrode to distinguish the second sub-pixel and the third sub-pixel,
The hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer of the third organic light emitting layer are connected to each other with the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer of the second organic emission layer so as to cover the second bank. Display device. Board;
A first electrode provided on the substrate;
A bank provided to cover an end of the first electrode;
An organic light emitting layer provided on the first electrode; And
It includes a second electrode provided on the organic light emitting layer,
The organic light emitting layer is formed by sequentially stacking a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer,
The hole blocking layer is a display device including a pattern portion provided between the electron transport layer. The method of claim 15,
A display device having both ends of the light emitting layer and the hole blocking layer coinciding with each other. The method of claim 15,
The pattern unit is a display device provided in at least one of a triangle and a hemispherical shape. The method according to any one of claims 1 to 17,
A display device further comprising a lens array spaced apart from the substrate, and a storage case accommodating the substrate and the lens array.

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